Micrometer-gage.



L. SCUSA.

MIOROMETER GAGE.

APPLIUATION FILED MAR.31,1909.

@@Lggi l Patented Jan.10,191.

- i 7'? Am! 5 UNITED STATES PATENT oEEioE. y

LIN-O SCUSA, OF SYRACUSE, NEW YORK.

MICROMETEeGAGE.

To all whom it may concern.'

Be. it known'that I, LINO SCUSA, of Syracuse, in the county of Onondaga, in the State of New York, have invented new .and useful Improvement-s in Micrometer-Gages, of which the -following, taken in connection with the accompanying drawings` is a full,

clear, and exact description. p

This invention relates to certain improvements in micrometer gages of' the'caliper ,type involving. the use of an internally "threaded barrel lin whichis movable a screwthreaded spindle having a predetermined' at one end with a sleeve-telescoping with. the barrel and movable lengthwise thereof `v pso that by properly graduating. the relatively movable parts, the exact distance between the end of the spindle and opposed abutment may be visually indicated bythe graduatons. Heretofore it has been eustoniaryytoproy vide the barrel' with a number of lengthwise graduations correspondinglto the number of threads perfinch on the threaded sleeve, such graduations being subdivided into tenths numbered from 0 to 0 including the digitals, while the sleeve is provided. with a circular series ot' graduations corresponding in number to the number ot thousandths per inch from. point 'topoint-,of adjacent threads on the spindle and numbered-ac- `cordingly. The graduations upon the barrel are necessarily close together, which nel cessitates close inspection for accurate reading, and` it not infrequently happens that such reading is erroneous owing principally to the fact that the end edge of the sleeve must necessarily cover the graduation with' which it registers, making it necessary for the operator to count the ii'nnuinbered. `graduations from the nearest numeral in. sight. I.

'My main object is to avoid this lialiility to error by usingl one or more rotary numbered disks actuated by the spindle to bringthc numerals successively in. registration .with suitable sight openings, whereby the smallest measurement may be read in numbers instead of by counting the number ot' graduationsfroin the nearesty numeral, as in the usual gagegot thi-J character. In other words, insteadoftlie Vernier gradnations on the barrel and-sleeve, I employ a series of, in this instance, 3 rotary disks arranged end vtoi end around a portion of the rotary thread- 'following description:

an inch, as in the present instance, thepferipliery of the disks wonld'be' divided into 20 equal .parts or graduations. AIf .the pitch is ,030 of an inch there would be. 30-subdi Avisions or gra'duations, and if *the Vpitch-dis .040, the periphery of the disk would bef vided into'40 zf ,traduations, and so onathreadof anypitch which is apmultipleof. lQlmav be employeththe correspondingfgraduations upon thedisks being dicidedinto series-,of 1'() -each numbered consecutivelygtliroughfthe digital range from() to Qinclusive.. .That- .;igs,

.'if thepitch ofthe thread is .020 and-theperiphery of each disk s divi-ded into 2Q .equal spaces or graduations, such graduationsivill Specification at Letters Patent.l Patent-ed Jan. 10 1911. Appiication ated March si, i909. serial No. 486,991.'

be divided i'nto twoseries of 10 eachgnum'- f bered through the digitalrange from O..to .-0 inclusive, and ifthe pitch of the threadds .080, the periphery of each disk would be dirided into'S() equal spaces or -ra-duations arranged in series of 10 each, those-of each s seriesfbcing also numbered through the dige tal range from O to 0 inclusive, in ordertihat theironsecutive numerals ot successiveconnter-disks may be registered in sequence-ivvitlaA their corresponding siglitopenings .to .india cate adjustment of the micrometer in. numerals, as tenths,` hundredths and t-hoiisandths of an iiich. n Another object of my invention is to -provide a simple mechanism for transmitting f rotarymotion from the threaded spindlcto the several disks. .1.1" e..

.A further object is to provide means for frictionally clamping. the rotary spindle against rotation when desired. A. :r-'

Other objects and uses relating to specific parts of the devise will be brought out inv the In the dra\vings -Figure is a side-elevati tion of the micrometer embodyingr the var i'- ous features of my invention. Fig.'2isian enlarged top plan or edge view of thesame showing.v the sleeve and a-pertured capin'sec'- tion. Fig. 3 an enlarged longitudii'ial 'sec-- 4. 5, (3 and 7 are transverse sectionalv views taken respectively on lines et+-4, 5-5, 6' "6 and 7-7,:-Fig. 3, looking in the directions Aiii 615 'spindle-- when it is desired hol ith ldicated by the arrows. Fig. 8 is a sectional view taken ou line S-S, Fig.v3. Fig. 9.15

a` perspective view of the detached cap for concealing the gears and greater portions of the disks. Fig. 10 is an enlargedw detailed sectional view of a portion of the sectional disk showing means for clamping the sections together, I

This micrometer comprises a U-shape bar A 1- having one a'rm provided with a suit- .able stop 2- and its other arm provided with a cylindrical extension or barrel -3-. The outer end. of the barrel -3- is threaded y 'interiorly at -4-- and is engaged by a threaded spindle ,-5- extendin'(r entirely through the barrel from end to end in alineo ment with the -rest or stop -2, the inner e end of the spindle -5- forming an opposed f stop-or abutment ,-6- co-acting with thebarrel from end to end, said recess '-7'- firmly s'ecured in the inner end of the barrel 43- or adjacent end of the bar -1- in alinement with the bore 9, and forms a convenient 'bearing for the inner end of the spindle`.-5-. This bushing -13- extends inwardly across the recess 7 to a .point in close proximity to the inner face ,of the disk -10-, and its outer end extends a short distance beyond the inner face of the adjacent end of the bore -9- or barrel -3'-, and is preferably split lengthwise forming jaws which areadapted to be frictionally clamped upon the spindle 5 by means of a frictionband -l4- to lock the spindle 5 against rotation when delsired. This band, which is more clearly shown'in Fig. 8, encircles the greater portion -of the adjacent split end of the bushing -13- and its opposite ends are .crossed and returned to a point in close .proximity to l ealch other, forming an openv loop '-15-v for vreceiving a tapering head 16 of a clampin bolt -17-. This bolt 17- is .vjournale inthe adjacent end. of the bar at o'ne side of the barrel '-3- and its `outer endg is threaded and engaged by a suitable" end nut -18- by which the'bolt 7" "may be moved endwise to frictiony enga-gethe tapering head 16- with fri'ction band 14- for clamping the ...r-fplit epd of the bushing `.,'13f upon`the vspindle against rotation or in its adjusted osition.

The disk -10- is composed of inner and outer rings -19- 'and -20- fitting with a snug but turning tit one Within the other, 7( and adapted to be frictionally locked together by a segmental friction key 2land tapering bolt -22, as best seen in Figs. 3. and 10. The object in making this disk in sections or separate rings is to permit 7E the outer ring whichfbears the lgraduations to properly register such graduations with a fixed graduation, as 23- on the periphery of the adjacent end of the barrel -3-.-. This disk 10 is mounted\ directly upon 8( the spindle 5 to rotate therewith, and for this purpose,V the inner ring -19- is formed with a key 524- which rides in a keyway ,-25- in the spindle -5-, thereby'locking the -disk l0- to the spindle 82 and atthe sametime permitting such spindle to move endwise as itis. rotated. in the threaded portion 4'- of the barrel -'3-,

Thedisks -11- and l2- are rotate"y ingly mounted upon the inner end of-the 9( bushing -13-. and are spaced apart from each other and from the disk l0-by intervening washers-26- and -27- which are also mounted upon" the. inner end of Athe bushing -v 13-.. -The outer ends of the 9: disks'. l1- and ,-12- are provided with gears -28- and 29- rotating therewith and 4meshing with'suitable pinions .-30- and -31- which are journaled end to end upon the-bolt -17'- within the branch chanl( nels or recesses -8-; The pinions are spaced. apart by an intervenin web or partition 34- and are preferab y somewhat widerthan the gears `28- and .-29- with which they mesh, 1| so as to project axially toward the disks -10- and -11-- respectively, some dis-1 tance beyond the outer faces of their respective gears.v The disk -1( is-'provided wit-h a plu- 11 rality of, in this instance, two' diametrieally opposite laterally projecting studs or-pins -35- arrangedequidistantfrom the axis 'ofsaid disk and positioned-so as to mesh with the teeth of the corresponding piuion 1 `30- as the disk -10- is rotated by the rotation of the spindle 5, the latter b ing provided with a' sleeve -5"- which'telg-'\ scopes with the, outer end of the barrel -3-" and serves as a convenient means for rotat\ 1` ing the spindle. i The periphery of the disk -10- or rather of the ring -20-' is divided -bysuitablc graduat-ions into aseries of, in this instance, twenty equal spaces, said graduations being 1 grouped in separate series of 10 in each group, those of'each series being numbered consecutively by .the digits from 0 to 9 inclusive', and an additional O indicating the tenth graduation of the series. It is, 1

therefore, apparent that the periphery of the disk 10- is provided with, in this instance, two groups of numerals, those of each group embracing half of the periphery of the disk and numbered consecutively, 0, 1, 2, 3, 4, 5, (3, 7, S, 9, Q, indicating ten subdivisions on each half'of the disk. It may be stated'here that these graduations and set of pinion operating studs are arranged for a spindlefhaving 50 threads to the inch, or a pitch of .02C of an inch, and, therefore, each graduation of the disk l0-represents .001 of an inch, and by locating the pins or studs -35- diametricarlly opposite to each other, as shown in Fig. i, it is evident thatthe corresponding pinion -30- will be moved one tooth space atl each half revolution ,of the spindle -5- and disk O--seeured thereto, thereby imparting a similar movement to the disk -e-llha ving the gear -28- Which meshes w'i'th thel pinion -30"-'.

`The peripheries of the disksi-lland -12- are graduated in the same" manner asklescribed for the disk'`-10-, the disk ilbeing provided with diametrically7 opposite laterally yprojecting studs -40-,

-Fig. G, which 'mesh with the corresponding'l pinion -31-,- the latter in turn'meshing with" the gear``29- so that at each half revolution tof* the .disle 11- the pin-ion 31- will be moved one tooth space, thereby limparting a similar degree of movement Ao'rrotationjo the gear -29- and its cor# responding disk --1'2-.

A hood or cap t2-i is removably fitted upon the end 'of the bar -lladjacent to the barrel -3--, to inclose and conceal the friction clamping device and gears, and

.greater portions of the disks, said cap being provided in one side with a4 series of sight opemngs43-, 44rand 't- 1n registration with thc peripheries or the correthe sight opening being preferably elongated to enable the operator to read the numeral which may be in registration withy inch. apart, lthespindle being at the limity of its inward movement. y

Now ass-uming that We iish to set. the instrumentl formeasuring 1.009 inches, it vwill be simply necessary to turn the sleeve ',5 and spindle' -5-- to the left or in the "direction indicated by arrow 'X. Fig. 4, unf' til the hidden numeral Q assumes the position now indicated by O7 at the, right.A

hand of thesame figureren in registration with the sight opening and fixed graduation Q3-s If it is desired to make the measurement 1.010 inches, the sleeve .-5- and spindle will be rotated lin the same direction, thereby rotating thedisk --10 in the. d i. rection indicated by arrow X, Fig..h4',g70 until such disk con'ipletes a halfrevolutiolng; so that the 0 at the lett is positionedto register with the graduation 23., During, the inoven'ient of the disk --10- from the numeral-9" to the succeeding graduation-g5 0" or 1()"" the upper pin -33- willhare engaged'and operated the pinion 13D- one tooth space so that the st ud the upper side of Fig. 4 will assume the i same position a's thestud at the lower side, 80 thereby lnoving the gear -28- and oor-l'` responding'disk one tooth space om graduation from .0 to 1 bringingfthe'.. numeral. 1 of lthe 4disk 1l-A i 1't-\,re'g is tration with the sight opening while 85 the numeral 0 'of the disk 10svi in registration ,with the sight ,op -43- and fixed graduatiom-.Q- if this movement of the disk 10ftinued through another lia'lf revolution, .thez90 brought` into registration withI the gsightg. openlng` p numeral O7 yofthe disk- IVO- isgregisteredv with the fixed ,graduation 1@95 is now clear that at eachfcomplete revo1u-Y tion of the diskflO-jthe disk lL-f; will be moved two points and thatwhen thedisk -11'- 'is moving1 from the ninth toj t-lie-,- tenth pointin the first half revol'ntion,itc100 will move the disk 12- onepointthroughm the medium ofthe studs or pins -.-4O-T. andf. pinion It is thus apparent that inl s; this instance at each half revolution they spindle which rotates the disk '-1`0-,te n105 points, the movement ot said disk. f`x'or 11,the,v

ninth to the tenth point, will cause, one f, of the pins 'or studs thereon lto en,l A gage and rotate the pinion `30 one -to oth space, thereby movingl the. corresponding gear and dis'kW-lfvl# one toothsparey on' point, andby continuing the rotationfof-the .spindle through the next half frevoliitionv the opposite stud will similarly engage and operate the pinion ,-30,- a second 115 time one tooth space,'.r thereby movingihet disk H to the second point orgradua-g tion marked 12T and at. the same time the; t f

disk '--llwill Abe ,liroughtv into registration; p with 4die sight opening, thus .registering 120 .020 lin numeralswhleh, indicates lthe pitch of the thread or onecomplete revolution of In like manner, during `the 1 the spindle. rotationof lthedisk -llf ten points, thel lmovement from 9 to 0 of the last 125 space will cause onev of the vstuds f40 to engage Aand rotate the corresponding pinionv one tooth. space, thereby similarlyrotatingthe disk 1Q- one point or graduation, lin- I dicating tenths f an inchLit being under- 11.3%

, vial? assises 4 gema? stood that the disk 1L- indicates hundredths, While the disk 10- indicates thousandths.

As a further illustration of the operation of my invention, suppose it is desired to adjust the instrument for 1.125 inches--4 .this lmay be accomplished by rotating the spindle -5- and disk -10- feathered thereby effecting a combined registration of 1, 2,5, indicating thousandths of an inch, the stops or abutments being previously adjusted an` inch apart. 'It is clearly evident, however, that the same principle applies to threads of any pitch which is divisible by l0, as, for'example, if .030 of an inch pitch 'is employed, the disks would bev graduated into 30 equal spaces numbered consecutively in groupsof ten each through the di ital series from 0 to 0 inclusive, in w ich case each of the disks -10- and 11- `would be provided with three studs or pins spaced equidistant apart so as to A operate the next succeeding disk one point at each one third revolution of the spindle. In like manner, if the thread is of 40 pitch, the periphery of each disk would be divided into 40 equal spaces grouped into-four series of ten each and each series numbered through the digital scale consecutively from 0 0 inclusive, in Which case each of the disks l0- and -11 Would be provided with four of the studs4 35- spaced equidistant apart and operating "the next succeeding disks one point at each one quarter-of a revolution of the spindle.

What I claim is .f 1. In a micrometer gage, a substantially U-shapedbar having one of its arms 'provided with a barrel formed with a bore having a portion of-its length screw-threaded, that` arm provided with the barrel further 4having a recess intersecting said bore, a

threadedA spindle extending throughsaid bore and recess, and provied with an integral sleeve inclosing a portion of saidy barrel, a rotary disk arranged Within said recess and mounted directly upon and actuated by the spindle and provided with a circular .series of numbered graduations, a second disk having-.a l series .of graduations arranged Within said recess and inoperative relation with respect to the vfirst Qdisk, a

bearing for the second disk, 'meansarranged within said arm and below said recess for intermittently operating said second disk,

and means forming a part of said first disk and intermittently-engaging with the actu'- ating means--forthe second disk for operating said actuatingmeans.

2. Inv a micrometer gage, a substantially U-shaped bar' having one of its arms provided with a barrel formed with a bore having a portion of its len h screw-threaded, that arm provided Wit the barrel fur# ther having a recess'intersecting said bore,

'a threaded spindle extending through said -bore' and recess, and provided with an l integral sleeve inclosing a portion of said barrel, a rotary disk arranged Within said recess and mounted directly upon and actuated by the spindle and provided with a circular series of numbered graduations, a second disk having a series of graduations arranged Within said recess and in operative relation with respect to the first' disk, a .bearing for the second disk, means arranged within said arm and below said recess for intermittently operating said second disk,z means forming a partA of said,` first disk and intermittently engaging with the actuating nieans for the second disk for operating saidv actuatingmeans, and a cap mounted upon said arm and rovided with'exposure openings for Asai' graduations and further provideduponits periphery with a cular series of numbered graduations, a second disk having a series of graduations arranged within said series and in operative relation'with respect to the first disk, a bearing for the second disk, ,means arranged within' said arm and below-said recess for intermittently y,operating said secondl disk, means forming appart of said first disk and intermittently engaging Withthe actuatin means for the seconddisk for lo'peratir'ig said actuating means,V and means enga 'ng with the bearing of the second disk for figli g said spindle vin its adjusted position.

4.' Ih a micrometer gage, a substantially U-'shaped bar 'having one of' its 'arms provided with abarrel formed with a bore hav-4 ing a portion of its length screw-threaded, that-arm provided with the barrel further havin arecess intersecting said bore, a threa ed spindle extendin through said bore and recess, andprovi ed lWit-h an integral sleeve inclosing a' portion of said rotary disk arranged within Said recess and inonnttd directly npon ated by the spindle und providnd with :i fircnlzlr series oi numbered grudnntions, n sorond disk haring :i series of grmlnntions arranged within Suid rvcess and in oprntive relation with i-sprl to tho lil-st disk, z: honring for tinx second disk. moansarranged within Said' :irin and below Suid recess for interinittrntlxY operating; Suid second disk, means 'forming :1 part ot smid first diS i :ind inttrniittcntly engaging' with the actuating meaiis torthosetond disk for operating` Suid l l l l i l l actuating means, n Cap mounted upon Said nrnl :ind providwl with eXpoSnre openings ior smid grndnnti'ons :1nd further provided npon its periplwry with :i fixed grat'lnation, und niezins engaging' with the bearing oi the second disk for fixingv Huid Spindle. in its adjusted position.

In witness wher-voi have hereunto sety my hand this 24th day ot' March 1909.

' LIN() SCUSA.

'itnonsog:

H, E. CHASE,

J. iii. Hon,Q 

